JP4959295B2 - Aluminum rice cooker. - Google Patents

Description

  The present invention relates to an aluminum rice cooker in which heating is evenly distributed and rice is efficiently cooked.

Conventionally, aluminum rice cookers have been widely used in electric rice cookers and the like because of their good thermal conductivity and easy production. In particular, a continuous gas rice cooker uses a large-sized commercial aluminum rice cooker from the viewpoint of efficiency, and also uses a cylindrical round kettle with a rectangular shape, but an aluminum rice cooker with a rectangular cross section Is frequently used. Moreover, in the gas rice cooking line of the aluminum rice cooker for business use, the inner peripheral surface of the rice cooker is subjected to fluororesin processing on the entire inner peripheral surface in order to improve the reverse discharge of the cooked rice.
In addition, the technique which gave the ceramic layer to the outer periphery of the side surface of a rice cooking container is disclosed as patent document 1. FIG.
Japanese Patent No. 3663632

By the way, as disclosed in Patent Document 1, the rice cooker has a ceramic layer on the outer periphery of the side surface of the rice cooking container, but the bottom is not sufficiently heat-retaining with an aluminum background, and is outside like an electric rice cooker. When the frame is provided, there are few problems, but some large rice cookers for business use some heating when steaming. In addition, the rectangular rice cooker that has a rectangular cross section, which is often used in continuous gas rice cooking lines, tends to have uneven heat transfer at the bottom and side corners due to its rectangular cross section. It is thought that this is the cause of the variation in cooking rice. In order to cope with this problem, the heat receiving ability and the heat retaining ability of the entire rice cooker were improved, and a modification was required to obtain uniform heat convection.
In addition, the gas cooking line of aluminum rice cookers for business use is used repeatedly from high to severe conditions and several times to 10 times a day at high temperatures. The lid is attached and detached twice, and the inner surface of the pot is processed with fluororesin in order to improve the reverse discharge of the cooked rice, but it is fluororesin especially on the contact surface with the lid due to high temperature and repeated contact. (Teflon (Registered Trademark)) film peeling, peeling wounds, turning cracks, and other problems occur, which is one of the causes of “foreign matter contamination”.

  The present invention has been made in view of the above-mentioned problems, and improves the heat receiving capacity of the entire rice cooker, obtains uniform heat convection, equalizes heat transfer, enhances heat retention, and has high quality without cooking spots. It is possible to obtain cooked rice, and it prevents partial temperature rise at the upper end mouse part and eliminates the peeling of the fluororesin film applied to the inner peripheral surface and eliminates the mixing of fluororesin peeling debris. An aluminum rice cooker having a circular and rectangular cross section is provided.

In order to solve the above-mentioned problems, the invention of claim 1 is an aluminum rice cooker, and the entire outer periphery including the outer peripheral surface of the upper edge of the aluminum rice cooker is covered with a black ceramic layer having a large heat capacity. In addition, the inner peripheral surface excluding the upper end edge of a predetermined width including the portion where the lid part comes in contact with the rice cooking regulation water surface is covered with a fluororesin, and the upper end edge is an aluminum background portion. This is a commercial aluminum rice cooker.
The invention described in claim 2 is the aluminum rice cooker for business use according to claim 1, wherein the aluminum rice cooker has a substantially rectangular cross section .

One of the features of the present invention is that the conventional large-sized aluminum rice cooker for large-scale rice cooking with a substantially circular and rectangular cross section is likely to cause rice plate cooking spots at the bottom and side corners. In order to increase the heat receiving capacity and heat retention capacity (heat capacity) of an aluminum rice cooker with a rectangular cross-section to eliminate the unevenness of cooked rice, a black ceramic is sprayed on the entire outer surface of the aluminum pot to increase the heat capacity. Since the heat efficiency is improved and the cooked rice can be cooked uniformly and efficiently, the homogeneity of the cooked rice is improved. As a result, the boiling time is faster compared to the conventional aluminum rice cooker. This is an efficient aluminum rice cooker. Also, a black ceramic is sprayed on the entire outer surface to improve the protection function against overheating and dents.

  One of the features of the present invention is that the conventional rice cooker made of aluminum having a substantially circular and rectangular cross section tends to cause rice plate cooking spots at the bottom and side corners. In order to increase the heat receiving capacity and heat retention capacity (heat capacity) of the rectangular aluminum rice cooker, black ceramic is sprayed on the entire outer surface of the aluminum pot to increase the heat capacity, improving heat retention efficiency, and efficiently Since cooked rice can be cooked uniformly, the homogeneity of the cooked rice is improved. As a result, compared to the same conventional aluminum rice cooker, the boiling time is faster and the aluminum cooker is more efficient. It is what. Also, a black ceramic is sprayed on the entire outer surface to improve the protection function against overheating and dents.

In addition, commercial-use aluminum rice cookers are heated with a certain amount of washed rice and fresh water supplied, but there will be a temperature difference between the part near the water level, the lid, and the upper edge of the aluminum rice cooker. The upper part of the aluminum rice cooker has a small heat capacity, so the temperature rises partially as it goes to the upper part, and if there is a fluororesin film on this part, peeling tends to occur, and the fluorine at the upper edge part where the lid is frequently attached and detached repeatedly The resin film was peeled off by contact with the lid and mixed with the cooked rice as a foreign substance, which deteriorated the quality of the cooked rice.
One of the features of the present invention is that the upper edge portion where the lid is frequently attached and detached is not coated with a fluororesin film, and conversely, ceramic is sprayed outside the upper edge portion to increase the heat capacity. Since the partial temperature rise was prevented, the generation of fluororesin peeling debris on the inner peripheral surface was prevented, and there was no damage in the mouse part of the aluminum rice cooker, so the fluororesin film applied on the inner peripheral surface The lifespan of this is dramatically increased.

An example of an aluminum rice cooker having a preferred cross section of the present invention having a substantially rectangular shape will be described with reference to the drawings.
FIG. 1 is a side view from the long side of an aluminum rice cooker 1 having a substantially rectangular cross section, and FIG. 2 is a side view from the short side, a lower rice cooker container 2 and an upper lid 3. It consists of and.
As shown in FIG. 3, the shape of the upper end portion 21 of the rice cooker container 2 is used in a continuous gas rice cooking line. Therefore, the short side 211 (inner diameter of about 30 cm) is adapted to fit the space width of the line. And long side 212 (inner diameter of about 60cm), is a rectangular rectangle, made of aluminum with good heat conductivity or equivalent aluminum alloy and 3-8mm in thickness. A grip portion 22 that grips the hook container 2 itself is provided, and a fitting inner wall 23 that fits the annular fitting protrusion 32 of the lid portion 3 is provided inside the upper end portion 21. In addition, at the time of rice cooking, the fitting convex part 32 is provided in the bottom peripheral part 31 of the cover part 3, By making this fitting convex part 32 fit to the fitting inner wall 23 of the rice cooking pot container 2, it is a rice cooking pot container. The lid 3 is automatically moved up and down via the lid gripping part 33 by automatic operation.
In addition, although it was set as the aluminum rice cooker whose cross section was a rectangle as an Example, a round pot like a household electric kettle with a circular cross section may be sufficient.

Further, the bottom of the rice cooker container 2 is a substantially flat plane, and the shape thereof is also rectangular. A portion 25 is provided to form a rice cooker that is slightly depressed toward the bottom 24.
The side wall portion 25 of the rice cooker container 2 is coated with a fluororesin to form a fluororesin film 4, but the standard water level A (regulated water surface in the present invention) and the upper edge portion (231) at the time of rice cooking. A predetermined horizontal position between B and B is defined as a boundary level C, and a fluorine resin is applied to the lower side of the boundary level C to form a fluorine resin film 4, and the mouse portion of the rice cooker container 2 above it has an aluminum background. It is set as the part D, and it is comprised so that the cover part 3 may not contact the fluororesin film | membrane 4 part, and it is made not to generate | occur | produce the peeling waste of a fluororesin like the past.
The boundary level C of the fluororesin coating 4 is higher than the upper end surface of the cooked cooked rice. In addition, although the scale 26 is attached | subjected to the inner wall surface, the upper surface position E of the washing | cleaning rice is located in the lower rank rather than the standard water level A. FIG.
In the present embodiment, the process of applying the fluororesin to a thickness of 0.015 mm is repeated three times, and the fluororesin film 4 having a thickness of 0.04 to 0.05 mm is applied and firmly coated.

On the outer peripheral surface of the rice cooker container 2, a ceramic layer 5 is formed by thermal spraying a black ceramic containing copper / iron / manganese composite oxide, aluminum oxide, titanium oxide or a binder on the entire outer periphery. . As a means for forming the ceramic layer 5, a heat resistant high performance (black) ceramic (liquid) is sprayed on the entire outer periphery of the main rice cooker container 2. After that, it is processed in a furnace controlled at a temperature just before melting (380 to 390 ° C), and the entire outer periphery of the aluminum ingot part, which is the main body of the rice cooker container 2, is made of black ceramic with an average thickness of about 0.02mm. As coated. By such spraying means, a strong black ceramic layer 5 is formed on the entire outer periphery of the rice cooker container 2.
The ceramic layer 5 may be formed by ceramic coating other than ceramic spraying as long as it is firmly fixed to aluminum. In addition, since ceramic emits far infrared rays, rice cooking efficiency is improved, but if one that emits far infrared rays is selected more, rice cooking efficiency is further improved.

  As described above, according to the present embodiment, by covering the entire outer periphery of the rice cooker container 2 with black ceramic, the heat receiving ability and protection ability of the rice cooker are enhanced, and the peeling prevention function against overheating and dents is improved. Because the heat capacity is increased by spraying black ceramic on the entire outer periphery of the aluminum pot, the heat retention efficiency is high, and it can be cooked uniformly and efficiently. Disappearance of cooking spots at the bottom and side corners, which is a drawback, improves the homogeneity of the cooked rice, resulting in approximately 15% compared to the same aluminum rice cooker without the ceramic layer 5 as a result. Boiling time has been shortened.

In addition, a conventional commercial aluminum rice cooker is heated in a state where a certain amount of washed rice and fresh water is supplied, usually 60% of the content of the rice cooker. The lid above the water level and the upper edge of the aluminum rice cooker have a large temperature difference near the top of the aluminum rice cooker, so there is a large temperature difference. If there is a fluororesin film on the part where the temperature rises partially, the fluororesin will be easily peeled off. The fluororesin itself in the mouse part became exfoliation debris and mixed as a foreign substance in the cooked rice, which was a product, and the quality of the cooked rice sometimes deteriorated.
However, in the embodiment of the present invention, the upper edge portion which is the mouse portion of the aluminum rice cooker 2 is not coated with the fluororesin film, and conversely, the outer peripheral surface of the upper edge portion is coated with the black ceramic 5 having a large heat capacity. Therefore, the partial temperature rise in the vicinity of the upper end portion of the aluminum rice cooker 2 is eliminated. That is, the predetermined horizontal position between the standard water level A and the upper edge B at the time of cooking the coating portion of the fluororesin film 4 is set as the boundary level C, and the lower side is processed with fluororesin, and the upper side is shot Since the processed aluminum background portion D is used, there is no generation of fluororesin peeling debris, and the chance of foreign matter mixing into the cooked rice, which is a product, can be eliminated.

In addition, as an incidental effect, the life of the fluororesin film applied to the inner peripheral surface has been greatly extended since there is no damage in the mouse portion of the aluminum rice cooker.
Furthermore, the conventional aluminum rice cooker can be easily modified.For example, during regular repair of a conventional rice cooker, it can be easily modified by thermally spraying ceramic on the entire outer surface of the aluminum rice cooker. Is possible.
Of course, the present invention is not limited to the above-described embodiment as long as it does not impair the features of the present invention. For example, in this embodiment, aluminum having a substantially rectangular cross-section with remarkable action and effect is used. Although described with a rice cooker, it is a matter of course that it can be used for an aluminum rice cooker of a round pot having a substantially circular cross section. Although the main body is made of aluminum, it is of course possible to use an aluminum alloy equivalent to aluminum as long as the thermal conductivity is good.

Partial sectional view from the long side of an embodiment of an aluminum rice cooker of the present invention, FIG. 1 is a side view from the short side of FIG. The top view from the upper side of the aluminum rice cooking container of FIG. It is an expanded sectional view of the X section of FIG.

Explanation of symbols

A ... Standard water level during cooking (regulated water surface), B ... Upper edge,
C: Boundary level (upper end of fluororesin film), D: Aluminum background,
E: Top position of washed rice
1 ... Aluminum rice cooker,
2 ... Rice cooker container, 21 ... Upper end, 211 ... Short side, 212 ... Long side,
22 ... gripping part, 23 ... fitting inner wall, 231 ... edge,
24 ... Bottom, 25 ... Side wall, 26 ... Scale,
3 ... lid part, 31 ... bottom peripheral part, 32 ... fitting convex part, 33 ... lid gripping part,
4 ... Fluororesin film,
5 ... Ceramic layer

Claims (2)

An aluminum rice cooker,
While covering the entire outer periphery including the outer peripheral surface of the upper edge of the aluminum rice cooker with a black ceramic layer having a large heat capacity ,
A business characterized in that the inner peripheral surface except for the upper end edge of a predetermined width including the portion where the lid part comes in contact with is higher than the rice cooking regulation water surface, and the upper end edge is an aluminum background portion. aluminum rice cooker use. The aluminum rice cooker for business use according to claim 1, wherein the aluminum rice cooker has a substantially rectangular cross section .

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